Apple released iOS 4.3.1 with a lots of new features and bug fixes over iOS 4.3, many of you already updated to iOS 4.3.1 and used an untethered jailbreak which is buggy and most of Cydia apps are incompatible at the moment. Following are the instructions to downgrade your iPhone, iPod Touch or iPad running on iOS 4.3.1 to a lower firmware version i.e. iOS 4.3, 4.2.1 or 4.2, just make sure that you had saved your Cydia SHSH for the firmware you want to revert back.
Download Required :
- First of all open TinyUmbrella and close immediately, this will modify your hosts file automatically.
- Launch Tiny Umbrella again and connect your device.
- Click the Start button TSS Server (iTunes will close automatically)
- Open iTunes and click Restore + Windows Shift or Restore + Option key on Mac.
- Select the firmware you want to downgrade i.e. iOS 4.2.1 for iPhone 4 etc.
- Restore process will take 10-15 minutes, do not close Tiny Umbrella.
- If all went well, you can go to Tiny Umbrella and press Stop TSS Server.
After restore process if you encountered an error message like 1011, 1013 or 1015 just ignore them(Actually the firmware is already installed). To exit recovery mode simply press TinyUmbrella “kick device out of recovery mode” button. Wait until your device restarts, if you are still in recovery mode then put your iDevice in DFU mode and restore once again, following are the instructions to put your iDevice in DFU mode
- Connect your iDevice to your computer.
- Turn your iDevice off.
- Hold power and home together for 10 seconds (exactly).
- Release power but keep holding home until the computers beeps (observed on a PC) as a USB device is recognized.
- A few seconds later iTunes should detect your iDevice.
- If the Restore Logo is present on the screen, you are in Recovery Mode, not DFU, so follow the process once again.
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